2004 SR Johnson 2 Stroke 9.9, 15, 25, 30 HP Outboards Service Manual, Page 168Get this manual
FUEL SYSTEM INTAKE MANIFOLD
2530 MODELS
IMPORTANT: All intake manifold components must be perfectly clean before assemblyDo not use strong carburetor cleaner or hot soaking tankPlace leaf valves on leaf plateIf new valves do not seat on the leaf plate, turn the leaf valves over
Viewed from the back (leaf stop) side, the alignment notches must face as shownThe port notch will face one o'clock and the starboard notch will face 11 o'clockFailure to follow this procedure will cause premature leaf valve failureCenter the leaf valves on the plate using the index marks21Alignmentnotches Index marks